The native projection of these data is described as a high-order polynomial distortion of a gnomonic projection using the same terms as the DSS.
|Provenance||Data taken by ROE, AAO, and CalTech, Compression and distribution by Space Telescope Science Institute.|
|Copyright||There are multiple copyright holders depending upon the source plate or plates. See full copyright notices The coverage link below describes the coverage for each element of the surveys when the original plate used is not included in the SkyView files.|
|Coverage||All-sky, but some data not yet be processed.|
|PixelUnits||Pixel values are given as scaled densities|
|Resolution||Depends on plate. Typically 3".|
Some information on the DSS2 is given in
McLean, 2000, The Second Generation Guide Star Catalog.
Characteristics of the DSS surveys are summarized in this document.